1. Morris Ginsberg: Sociology. New York: H. Holt 1934.
2. Karl Mannheim: Ideology and Utopia. An Introduction to the Sociology of Knowledge. Translation by Louis Wirth and E. Shils. New York: Harcourt Brace Co. 1936.
3. Karl Mannheim: German Sociology 1918–1933. — In: Politica, February 1934, S. 12–33.
4. Vgl. dazu Beatrice Webb: My Apprenticeship. London: Longmans Green 1926. — Kitty MuggeridgelRuth Adam: Beatrice Webb. A Life 1858–1943. London: Secker & Warburg 1967.
5. M. Ginsberg/J.A. Hobson: L.T. Hobhouse. His Life and Work. London: G. Allen & Unwin 1931.